Pravdyuk, A. I. “Differentiation of Cryopreserved Bone Marrow Stromal Cells in Alginate Microcarriers”. Problems of Cryobiology and Cryomedicine, vol. 18, no. 1, May 2008, pp. 134-7, http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/471.